Molding-machine flask.



. Patented Sept. 5, I899.

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HARRY O. COOPER, OF CHICAGO, ILLINOIS.

MOLDING-MACHINE FLASK.

SPECIFICATION forming part of Letters Patent No. 632,248, dated September 5, 1899. Original application filed December 19, 1898, gerial No. 699,720. Divided and this application filed May 31, 1899. Serial No.

To all whom it may concern:

Be it known that I, HARRY O. COOPER, a citizen of the United States, residing at Ohicago, county of Cook, State of Illinois, have invented a certain new and useful Improvement in Molding-Machine Flasks; and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings,which form a part of this specification.

My invention has for its object the production of a flask for use more particularly in a molding-machine where the sand moves in the flask both downwardly and upwardly such, for instance, as shown in my concurrently-pending application filed December 19, 1898, Serial No. 699,720, of which this application is a division.

The invention also relates to the combination of a flask and the chill for forming the tread portion of a wheel-mold.

The invention will be hereinafter more fully described and claimed.

In the drawings, Figure 1 is a vertical section through my flask and the adjacent parts. Fig. 2 is a cross-section of one of the ribs. Fig. 3 is a plan view of a portion of the flask.

In carrying out the invention, A represents the flask, and A the runner-box thereof.

B represents the chill; O, the chill-support; D E, rings supporting, the chill-support; E, the standards or connections extending to the operating part of the machine; F to F, the pattern-supporting parts, and G G G2 sections of the pattern.

The particular mechanism for supporting and moving the flasks and pattern parts is immaterial in this case, and I have not, therefore, shown it, that shown and described in my above-named application being applicable, if desired.

A represents the ribs, connecting the flask proper and the runner-box and supporting the latter. There may be as many of them as desired. Their upper and lower edges are both sharpened, as at A The lower edge of the runner-box is also sharpened, as at A. The sharpening of the ribs and the lower edge of the runner-box is to permit the sand (No model.)

when it is compressed between the upper pressure mechanism, which I have represented at H,and the upwardly-moving pattern parts to readily slip past the ribs, no matter from which direction it is moving, and also to readily slip past the lower edge of the runner-box when it moves upward with respect thereto.

It will be observed that the inner face A of the flask A and the adjoining inner face 13 of the chill 13 form a continuous line or face without a substantial break or angle. This is accomplished by making the face A of the flask continuous Without an angle or pocket and by curving or tapering the corner of the chill, as at B, and having the faces A and B register with each other. Thus when the sand is compressed the curved or tapered surface throws the sand out against the portion of the pattern opposite where the face B terminates and compresses it tightly against the pattern. This is a material advantage where machine-pressu re is used, as in my case, since with the vertical pressure, which is the only direction in which the machine-pressure can be applied, if there were any angles or pockets along the face of the flask the sand would not be compressed tightly against the face of the pattern where these angles. or pockets were located; but by curving the surface, as above described, the vertical pressure of the machine is converted into a lateral pressure by directing the sand laterally against the pattern part.

While I have just described the flask and chill as having their inner faces formed smooth, as at A B, yet it is obvious that this particular feature of the invention is not lim; ited to a Wheel-mold, but that whenever it is desired to obtain a strong lateral compression on the face of the pattern the face of the flask might be provided with the smooth curved surface mentioned, or the face of the flask and the adjoining faces of the flasksupport (which in this case happens to be the chill) might be provided with this continuous smooth curved surface. So, also, the sharpening of the upper and lower edges of the ribs, as above described, is of importance in obtaining this lateral pressure just mentioned, since it the ribs were not sharpened the sand depressions is formed to direct the sand laterally when vertical pressure is applied and one or more ribs or webs extending inwardly from the inner face of the flask and sharpened on their upper and lower edges, substantially as described.

In testimony whereof I sign this specification in the presence of two witnesses.

HARRY C. COOPER.

Witnesses:

GERTRUDE I-IEIDELBERGER, LUTE S. ALTER. 

